The Telescope Array Low-energy Extension (TALE) experiment is a hybrid
air shower detector for observation of air showers produced by very high energy
cosmic rays above $10^{16.5}$~eV.
TALE is located at the Telescope Array (TA) experiment site in the weste
rn desert of Utah, USA.
TALE has a Surface Detector (SD) array made up of 103 scintillation coun
ters (40 with 400 m spacing, 36 with 600 m spacing and 27 with 1.2 km spacing) a
nd a Fluorescence Detector (FD) station consisting of 10 FD telescopes located a
t the Telescope Array Middle Drum FD station, which is made up of 14 telescopes.
TALE-FD full operation started in 2013.
The deployment of the 103 SDs was completed in March 2017, and to date a
bout 70~$\%$ of the array is in operation with a full triggering and DAQ system.
Here we report an overview of the experiment, its capabilities and the t
echnical details of the TALE SD trigger and DAQ system from 4 month's operation.